Best PCB Assembly Service – OEM/ODM PCBA Manufacturing

Best PCB Assembly Service – OEM/ODM PCBA Manufacturing

Shenzhen Fumax Technology Co., Ltd. is a PCB assembly service company in China, providing PCB assembly, PCBA manufacturing, electronic design, SMT patch processing, DIP plug-in post-soldering, finished product assembly testing, and burning testing for the world.

What are the PCB assembly services provided by Shenzhen Fumax Technology Co., Ltd.?

PCB assembly manufacturer in China
  1. PCB assembly services include PCB processing, SMT patching, DIP plug-in, AOI inspection and functional testing.
  2. PCB processing. Processing is carried out according to the PCB drawings provided by customers, and PCB design consulting services can be provided at the same time.
  3. SMT patch. With advanced SMT patch equipment and professional staff, we can provide customers with high-quality SMT patch services.
  4. DIP plug-in. For some electronic components that cannot use SMT chip technology, they need to be assembled using DIP plug-ins.
  5. AOI inspection. In order to ensure assembly quality, the PCBA will be automatically inspected optically after assembly is completed.
  6. Functional testing. After the SMT patch and DIP plug-in are completed, the PCBA will be functionally tested.
PCB assembly companies in India

The top seven manufacturers of PCB assembly services in Shenzhen, China are:

  1. Shenzhen Fumax Technology Co., Ltd. Fumax is a global printed circuit board (PCB) assembly manufacturer, providing services such as PCBA design, SMT patch processing, electronic design, and component material procurement.
    Fumax provides PCB and PCBA OEM/ODM one-stop service.
  2. Shenzhen Kinwong Electronic Co., Ltd is a leading company in China’s printed circuit board (PCB) industry.
  3. Suntak Technology Co., Ltd. Specializing in the R&D, production and sales of printed circuit boards (PCBs).
  4. Victory Giant Technology (Huizhou) Co., Ltd specializes in the research and development, production and sales of printed circuit boards (PCBs).
  5. Shenzhen Fastprint Circuit Tech Co., Ltd is a company specializing in the research and development, production and sales of printed circuit boards (PCBs).
  6. Huizhou China Eagle Electronic Technology Co., Ltd. is a company specializing in the R&D, production and sales of printed circuit boards (PCBs).
  7. Tripod Technology Corporation is the largest manufacturer of printed circuit boards (PCBs) in the world.
PCB assembly factory

What needs to be done in PCB processing?

The PCB processing process includes the following steps:

  1. Design circuit diagram: Determine the layout and connection method of electronic components, and plan parameters such as the size and number of layers of the circuit board.
  2. Generate Gerber files: Convert the circuit diagram into a machine-recognizable data file, including line width, line spacing, aperture and other parameter information.
  3. Make steel mesh: Use pure copper mesh and screen printing film to print the circuit diagram on the copper mesh.
  4. Print graphics on the substrate: Use a printing machine and stencil to print the circuit diagram on the substrate.
  5. Corrosion: Corrode away the unnecessary copper layer, leaving only the required circuit.
  6. Drilling: Drill holes for the electronic components that need to be connected.
  7. Coated pads: Solder the pins of electronic components to the PCB board.
  8. Assemble components: Assemble the electronic components according to the circuit diagram connection method.

What is required for SMT chip processing?

The steps required for SMT patch processing are:

  1. Silk screen printing and dispensing process: Print the solder paste or patch glue onto the basic pad of the PCB, and then drip glue on the fixed position marked on the PCB board.
  2. Mounting: Fix and mount specific electronic components on the fixed position of the glue.
  3. Curing and welding: Melt the patch glue to make the components and the circuit board adhere firmly, and then melt the solder paste used for marking to make the components more securely fixed.
  4. Cleaning and quality inspection: Clean and remove harmful substances such as solder on the entire electronic board, and inspect the quality of the circuit board to remove substandard products for repair.

DIP plug-in process flow in PCBA

The process flow of DIP plug-in in PCBA is as follows:

  1. The staff of the pre-processing workshop go to the material department to collect the materials according to the BOM material list, carefully check the material model, specification and signature, and perform pre-production pre-processing according to the sample.
  2. Insert the processed components into the corresponding positions on the PCB board to prepare for wave soldering.
  3. Put the inserted PCB board into the wave soldering conveyor belt, and complete the soldering of the PCB board through flux spraying, preheating, wave soldering, cooling and other steps.
  4. Cut the legs of the welded PCBA board to achieve the appropriate size.
  5. Repair welding (post-welding) For finished PCBA boards that are found to be incompletely welded, repair welding and repair are required.
  6. Clean the harmful substances such as flux remaining on the finished PCBA products to meet the environmental cleanliness standards required by customers.
  7. After the component welding is completed, the finished PCBA board must be functionally tested to see whether each function is normal. If functional defects are found, they must be repaired and retested.

What are the requirements for AOI inspection in PCB?

  1. The requirements for AOI inspection in PCB are:
  2. Check the reflow soldering components on the top surface.
  3. Check the through-hole components before wave soldering.
  4. Check the through holes and SMD/SMC after wave soldering.
  5. Check the connector pins before press fit.
  6. Check the connector pins after press fit.

What are the requirements for AOI inspection in PCBA?

The requirements for AOI inspection in PCBA are:

  1. Check the welding components of the PCBA. If components are missing or offset, they should be adjusted immediately;
  2. Check the welding process of PCBA, such as soldering amount, solder joint quality, etc., to ensure that the welding process meets the standards;
  3. Check the function of the PCBA(Printed Circuit Board Assembly). If there is a functional failure, repair it immediately.

How does PCB assembly service manufacturer conduct functional testing?

The functional testing of PCB assembly service manufacturers mainly uses special testing equipment in the middle and end of the production line to conduct comprehensive testing of the functional modules of the circuit board to confirm the quality of the circuit board.

PCB assembly generation process flow

There are two main types of functional testing: final product testing and the latest physical model. Functional testing typically does not provide in-depth data but requires specialized equipment and specially designed test procedures.

In addition, AOI testing is also a commonly used testing method for PCB assembly service manufacturers. It mainly compares photos of PCBs with detailed schematics to detect faults in a timely manner.

What is the difference between PCBA (Printed Circuit Board Assembly) and PCB (Printed Circuit Board)?

PCBA services and PCB services are both commonly used terms in the circuit board manufacturing process, and the differences between them are as follows:

  1. The difference between PCB assembly and PCB concepts:

PCB usually refers to a printed circuit board, which is a board with electronic component pins and electrical lines; PCBA is a printed circuit board that is completed by laying out, welding and other processes of each electronic component based on the design requirements of the PCB. Assemble the board.
A simple understanding is that there are no electronic components assembled on the PCB; PCBA is a PCB board with electronic components already assembled.

PCB assembly is a certain manufacturing process based on PCB boards.

  1. Differences in PCBA and PCB manufacturing processes:

PCB manufacturing usually includes finished product production, CNC processing, molding, copper coating, drilling, outer layer finished product production and other processes; while PCBA manufacturing includes: component procurement, patching, through-hole plug-ins, post-soldering processes and other processes.

  1. Application differences:

PCB is usually used as the carrier of the core components of various complex electronic products, such as mobile phones, televisions, home theaters, etc.; while PCBA is the finished electronic product, such as computer motherboards, industry control circuit boards, etc.

  1. Feature differences:

PCB is a flat circuit board filled with air or other insulators, which can realize circuit connection and mutual signal transmission of electronic components, and has a low cost of use; while PCBA adds welding of components on the basis of PCB The process enables circuit board assembly and practical application.

To sum up, although PCB and PCBA are very similar in name, there are obvious differences between them. PCB, as the core component carrier in electronic products, plays an important role in the electronic design and production process;
PCBA is an intermediate product that is completed by adding components to PCB and assembling the finished electronic product.

The above is a detailed introduction to the best PCB assembly service manufacturers. I hope it can help more customers solve PCBA design, PCB assembly, and PCBA application problems.

Fumax is an OEM/ODM service provider of PCB assembly and PCB manufacturing in Shenzhen, China. To learn more about the production process of Fumax PCB assembly factory, please visit PCB Assembly Manufacturer Factory.

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PCB FAQs – PCB Assembly and PCB Design Q&A

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